解决全球饥饿的关键不仅是提高产量，还要改善营养质量。

I went to the woods because I wished to live deliberately. I wanted to live deep and suck out all the marrow of life, to put to rout all that was not life.

世界是一本书，不旅行的人只读了一页。

人类的所有成就都源于创造性幻想。那么我们没有权利轻视想象力。

我不相信运气，我相信准备。

制革厂的废物流比任何使命宣言都更清晰地讲述其道德故事。

不要以虚妄的心伤害自己的本心，不要因外在的因素伤害了自身。

惊奇是智慧的开始。

今天种下的每一棵树都是留给后代的遗产。

我不是天才。我只是努力工作，永不放弃。

The great powers are always searching for opportunities to gain power at the expense of their rivals, and they will use force if they believe it will bring them strategic advantage.